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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 11 (1 to 4); 12 (1 to 4); 13 (1 to 4); 14 (1 to 6); 20 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 4, 5-6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 40 (3); 41 (7, 8); 42 (5, 6, 8); 43 (1, 2, 5, 7, 8); 44 (1, 7); 45 (1 to 8); 46 (2 to 8); 47 (1 to 5, 10); 48 (1 to 12); 49 (1 to 12); 50 (1 to 9, 11); 51 (1 to 5, 7 to 9, 11, 12); 52 (1 to 12); 53 (2 to 12); 54 (1 to 12); 55 (1 to 12); 56 (1 to 12); 57 (1 to 12); 58 (1 to 12); 59 (1 to 3, 5 to 12); 60 (1 to 12); 61 (1 to 3)
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Internet Archive
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Preserved
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2025-08-08
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B30 to B35
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Portico
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Preserved
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2026-04-16
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Preserved : 1997: 32(1-6), 1998: 33(1-6), 1999: 34(1-6), 2000: 35(1-6), 2001: 36(1-6), 2002: 37(1-6), 2003: 38(1-6), 2004: 39(1-6), 2005: 40(1-6), 2006: 41(1-8), 2007: 42(1-8), 2008: 43(1-8), 2009: 44(1-8), 2010: 45(1-8), 2011: 46(1-8), 2012: 47(1-10), 2013: 48(1-12), 2014: 49(1-12), 2015: 50(1-12), 2016: 51(1-12), 2017: 52(1-12), 2018: 53(1-12), 2019: 54(1-12), 2020: 55(1-12), 2020/2021: 56(1-12), 2022: 57(1-8, 10-12), 2023: 58(1-12), 2024: 59(1-10, 12), 2025: 60(1-12), 2026: 61(1-4)
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CLOCKSS Archive
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Preserved
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2026-04-13
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ahead-of-print, 11 to 60
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LOCKSS Archive
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Preserved
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2026-04-13
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11 to 59
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CLOCKSS Archive
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Preserved
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2026-04-13
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45 to 52
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LOCKSS Archive
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In Progress
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2026-04-13
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60, 61
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 4 (1 to 6); 5 (1 to 9, 11, 12); 6 (1, 2, 5); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 4, 5-6); 41 (1 to 8); 42 (1 to 8); 43 (1 to 8); 44 (1 to 8); 45 (1 to 8); 46 (1 to 8); 47 (1 to 9); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12)
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National Library of the Netherlands
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Preserved
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2024-12-15
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Preserved : 11 (1-4); 12 (1, 2, 4); 13 (1-4); 14 (1-6); 15 (1-6); 16 (1-6); 17 (1-6); 18 (1-3, 4-5, 6); 19 (1-3, 4-5, 7, 8-9); 20 (1, 2, 4-6); 21 (1-6); 22 (1, 2, 4-6); 23 (1-6); 24 (1-6); 25 (1-6); 26 (1-4, 5-6); 27 (1-6); 28 (1-6); 29 (1-6); 30 (1-6); 31 (1, 3-6); 32 (1-6); 33 (1-6); 34 (1-6); 35 (1-6); 36 (4, 5); 37 (4); 38 (5, 6); 39 (1, 3, 5-6); 40 (1, 4, 5); 41 (1, 3-8); 42 (1-8); 43 (1-8)
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Library of Congress
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Preserved
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2025-04-07
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45 (2 to 8); 46 (1 to 8); 47 (1 to 10); 48 (1 to 12); 49 (1 to 12); 50 (1 to 12); 51 (1 to 12); 52 (1 to 12); 53 (1 to 12); 54 (1 to 12); 55 (1 to 12); 56 (1 to 12); 57 (1 to 12); 58 (1 to 12); 59 (1 to 11)
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